Investigation of the Voltage-Induced Damage Progression on the Raceway Surfaces of Thrust Ball Bearings

In the course of the electrification of powertrains, rolling element bearings are increasingly subject to electrical damage. In contrast to mechanically generated pittings, voltage-induced surface damage is a continuous process. Though several approaches for the description of the damage state of a...

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Bibliographic Details
Published in:Machines (Basel) 2022-10, Vol.10 (10), p.832
Main Authors: Harder, André, Zaiat, Anatoly, Becker-Dombrowsky, Florian Michael, Puchtler, Steffen, Kirchner, Eckhard
Format: Article
Language:English
Subjects:
Ball bearings
Bearing races
corrugation pattern
Damage
electric bearing damages
electric damage progression
Electric potential
Electric power
electric powertrains
Electrical raceways
Electrification
Experiments
Powertrain
Product development
Roller bearings
Surface properties
thrust ball bearings
Voltage
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Summary:In the course of the electrification of powertrains, rolling element bearings are increasingly subject to electrical damage. In contrast to mechanically generated pittings, voltage-induced surface damage is a continuous process. Though several approaches for the description of the damage state of a bearing are known, a generally accepted quantification for the bearing damage has not been established yet. This paper investigates surface properties, which can be used as a metric damage scale for the quantification of the electric bearing damage progression. For this purpose, the requirements for suitable surface properties are defined. Afterwards, thrust ball bearings are installed on a test rig, with constantly loaded mechanically and periodically damaged electrically in multiple phases. After each phase, the bearings are disassembled, the bearing surfaces are graded and measured for 45 different standardized surface properties. These properties are evaluated with the defined requirements. For the ones meeting the requirements, critical levels are presented, which allow for a quantified distinction between grey frosting and corrugation surfaces. These values are compared with measurements presented in the literature showing that the identified surface properties are suitable for the quantification of electrical bearing damages.
ISSN:2075-1702
2075-1702
DOI:10.3390/machines10100832